Captains, buddies, team leaders and support teams should comfirm entry and exit procedures and methods, underwater travel paths, dive depth and time, signal, role of each member, emergency actions, etc. .
Comfirm signal etc.
Also, in case of emergency, the buddies should know how to handle each other's safe second.
Check the type of safe second
Diving teams should use a water surface float to inform boat where diver location is.
